Charities United Kingdom Environment Thames21 Limited
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Thames21 Limited

Charity No 1103997 · Charity Commission Sign up to see website
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89
Integrity Assessment
Strong transparency
89/100 · methodology

About Thames21 Limited

Thames21 is an environmental charity that restores rivers across London and the Thames Basin to tackle the climate and biodiversity crisis, inspiring communities to enjoy, speak up for and look after them over the long term.

Founded
Size
medium

Focus areas & reach

· What they work on and where
🌿 Environment
Cause tags
SDG alignment The 17 UN Sustainable Development Goals (SDGs) are the global agenda for ending poverty, protecting the planet, and ensuring prosperity by 2030. We tag each charity to the goals its work advances.
SDG 13 SDG 13 · Climate Action Take urgent action to combat climate change and its impacts. SDG 14 SDG 14 · Life Below Water Conserve and sustainably use the oceans, seas, and marine resources. SDG 15 SDG 15 · Life on Land Protect, restore, and promote sustainable use of terrestrial ecosystems and biodiversity.

How it stacks up against peers

· vs. 8 similar environment in United Kingdom
Program spending This charity: 94%
Peer average: 97%
Integrity Assessment This charity: 89
Peer average: 88

Red flags

· All clear
Charity Commission removal
Open investigations
Governance scandals
Related-party deals
Excessive exec comp

Where every £1 goes

£0.94
Program expenses£0.94 (£3.1 million)
94% to programs beats the Charity Navigator "highly efficient" threshold (75%).

Common questions

· Auto-generated from filings + methodology

Thames21 Limited is a registered environment nonprofit, United Kingdom. It is registered with the Charity Commission for England and Wales. It was founded in 2004 and has been operating for 22 years. It has a GiveRadar Integrity Assessment of 89/100 (Strong transparency), indicating well-documented governance, financials, and contact details. The organization reports £3M in annual revenue. 8 officers and directors are publicly disclosed. No red flags have been detected.

Thames21 Limited has a GiveRadar Integrity Assessment of 89/100. This score combines five components: Registration (20 pts), Financial Transparency (30 pts), Governance (20 pts), Contact Availability (10 pts), and Data Recency (20 pts), with negative adjustments for any red flags. A score of 89 ('Strong transparency') reflects well-documented governance, recent financials, named leadership, and working contact details. The charity allocates 94% of expenses to programs, which contributes positively to its score. For comparison, the average integrity assessment for environment charities in United Kingdom is 88/100.

Thames21 Limited is registered in United Kingdom. The organization was established in 2004 and has been active for 22 years.

Based on official tax filings, Thames21 Limited has £3M in annual revenue. It allocates 94% of expenses to programs and services. This is in line with the average of 97% for environment charities in United Kingdom. Its revenue is significantly above the peer average of £1M. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.

Thames21 Limited is classified as a Environment organization, registered in United Kingdom. By size, it is categorized as a medium organization. It has £3M in annual revenue. The organization has 8 disclosed officers and directors.

No red flags have been detected for Thames21 Limited. GiveRadar automatically screens charities for concerning patterns including high executive compensation, low program spending, and missing financial filings. Based on available official data, no issues have been identified.

Thames21 Limited has a GiveRadar Integrity Assessment of 89/100 (Strong transparency) and no red flags have been detected, which suggests it is a well-documented organization. It is regulated by the Charity Commission. 94% of expenses go to programs. The peer average is 97%. You can donate directly through their official donation page linked on their GiveRadar profile. GiveRadar provides data for research purposes and does not endorse any organization. Always do your own due diligence.

Thames21 is an environmental charity that restores rivers across London and the Thames Basin to tackle the climate and biodiversity crisis, inspiring communities to enjoy, speak up for and look after them over the long term. Thames21 Limited is classified as a environment organization registered in United Kingdom. The organization was founded in 2004.

Among environment charities registered in United Kingdom: Thames21 Limited's GiveRadar Integrity Assessment of 89/100 is in line with the peer average of 88/100. It allocates 94% of expenses to programs, in line with the peer average of 97%. Its annual revenue of £3M is well above the peer average of £1M.

Thames21 Limited is a registered charity in the United Kingdom. If you are a UK taxpayer, your donation may qualify for Gift Aid, which allows the charity to claim an extra 25p for every 1 pound you donate at no cost to you. Higher-rate and additional-rate taxpayers can also claim additional relief on their Self Assessment tax return.

Verified against 4 official sources, last refreshed .

Annual revenue
£1M-£10M
94% to programs
Source: Charity Commission (UK) (FY2025) why this matters
Unlock exact figures

Filing history

5 years on file from Charity Commission (UK) (FY2025): revenue, expenses, program spending, assets, and liabilities by fiscal year.

Years on record: FY2025, FY2024, FY2023, FY2022, FY2021.
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Taxes

Tax-deductibility for donors

UK donations qualify for Gift Aid. THAMES21 LIMITED is registered with the Charity Commission. Eligible UK taxpayers can boost their gift by 25% at no extra cost.

Always confirm tax treatment with the charity directly or your tax advisor before donating.

Leadership

CH
Charles Edward Green
Trustee

Officers & trustees (8)

Source: Public filings

CH
Charles E••••• G••••
Trustee
CH
Charlotte E••• W•••
Trustee
DA
Darren A•••••• W••••
Trustee
DR
Dr K•••••••• S•••• R••••
Trustee
FA
Fabian S•••••
Trustee
GR
Grace E•••• R•••••••
Trustee
LA
Laura L••••••••
Trustee
MA
Mary L••••• M••••
Trustee
Full names, contact details & compensation

Free with an account.

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Latest news

From global news sources

1 article found

From global news sources

Sentiment

Neutral

Activity timeline

Filings and press mentions, merged

Form filed
£3.2M revenue
FY2025
CCEW
Supporting nature’s recovery on the River Roding - The National Lottery Heritage Fund
Oct 2025
www.heritagefund.org.uk
Form filed
£3.0M revenue
FY2024
CCEW
Form filed
£2.5M revenue
FY2023
CCEW
Form filed
£2.3M revenue
FY2022
CCEW
Form filed
£1.1M revenue
FY2021
CCEW

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Peer charities

Other environment in United Kingdom, by integrity assessment

Charity Score Revenue Program %
Thames21 Limited This page 89 £3.2 million 94%
Bronte Youth & Community Centre 89 £1.9 million 100%
Freshwater Habitats Trust 89 £2.8 million 99%
Forest of Dean Crossroads Caring for Carers 89 £1.9 million 100%
New Economics Foundation 88 £5.0 million 95%
The Naval Children's Charity 87 £1.5 million 96%
The Lifescape Project Limited 87 £1.1 million 94%
Age Concern Bromley 87 £2.2 million 99%
The Tree Council 87 £2.8 million 96%

Sources and verification

Refreshed

Registration and legal identity
Charity Commission for England and Wales - Register of Charities
Financial filings
Charity Commission annual returns - Fiscal year 2025 most recent on file.
Officers and trustees
Charity Commission for England and Wales - Register of Charities - 8 disclosed in the public registry.
News and media coverage
GDELT Project + Google News

Data freshness

Last updated
Apr 21, 2026
Profile completeness
85%

What we don't know

Honest gaps - our score reflects transparency, not impact

Executive compensation
Top-officer pay not disclosed
Mission statement
No self-published statement of purpose
Programs & projects
No named programs listed by the charity
Operating reach
Countries where programs run not specified

Methodology

GiveRadar combines public registry filings, ProPublica Nonprofit Explorer, Charity Navigator, GuideStar, and news archives into a single 0-100 integrity assessment. We don't take a cut of any donation, ever.

Read full methodology

Quick facts about Thames21 Limited

What is Thames21 Limited?
Thames21 Limited is a environment nonprofit organization, United Kingdom. Thames21 is an environmental charity that restores rivers across London and the Thames Basin to tackle the climate and biodiversity crisis, inspiring communities to enjoy, speak up for and look after them over the long term.
When was Thames21 Limited founded?
Thames21 Limited was founded in 2004.
Where is Thames21 Limited located?
Headquartered in United Kingdom.
What is Thames21 Limited's annual budget?
Annual revenue for fiscal year 2025 is approximately £1M-£10M. 94% of expenses go to program services.
Is Thames21 Limited trustworthy?
Thames21 Limited has a GiveRadar Integrity Assessment of 89 out of 100 (Strong transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
What is Thames21 Limited's website?
https://www.thames21.org.uk
Are donations to Thames21 Limited tax-deductible?
Donations may be tax-deductible for residents of United Kingdom under local rules. US donors should check whether the charity has an equivalency-determination letter or a US-based fiscal sponsor before claiming a deduction.